Motorola MC21XX SERIES Integrator Manual page 91

Hz. Hertz; A unit of frequency equal to one cycle per second.
Host Computer. A computer that serves other terminals in a network, providing such services as computation,
database access, supervisory programs and network control.
I
IDE. Intelligent drive electronics. Refers to the solid-state hard drive type.
IEC. International Electrotechnical Commission. This international agency regulates laser safety by specifying various
laser operation classes based on power output during operation.
IEC (825) Class 1. This is the lowest power IEC laser classification. Conformity is ensured through a software restriction
of 120 seconds of laser operation within any 1000 second window and an automatic laser shutdown if the scanner's
oscillating mirror fails.
Interleaved 2 of 5. A binary bar code symbology representing character pairs in groups of five bars and five
interleaved spaces. Interleaving provides for greater information density. The location of wide elements
(bar/spaces) within each group determines which characters are encoded. This continuous code type uses no
intercharacter spaces. Only numeric (0 to 9) and START / STOP characters may be encoded.
imaging scanning . MC21XXs with an integrated imager use digital camera technology to take a digital picture of a bar
code, store the resulting image in memory and execute state-of-the-art software decoding algorithms to extract the
data from the image.
Intercharacter Gap. The space between two adjacent bar code characters in a discrete code.
Interleaved Bar Code. A bar code in which characters are paired together, using bars to represent the first character
and the intervening spaces to represent the second.
Interleaved 2 of 5. A binary bar code symbology representing character pairs in groups of five bars and five interleaved
spaces. Interleaving provides for greater information density. The location of wide elements (bar/spaces) within
each group determines which characters are encoded. This continuous code type uses no intercharacter spaces.
Only numeric (0 to 9) and START/STOP characters may be encoded.
Internet Protocol Address. See IP.
IP. Internet Protocol. The IP part of the TCP/IP communications protocol. IP implements the network layer (layer 3) of
the protocol, which contains a network address and is used to route a message to a different network or subnetwork.
IP accepts "packets" from the layer 4 transport protocol (TCP or UDP), adds its own header to it and delivers a
"datagram" to the layer 2 data link protocol. It may also break the packet into fragments to support the maximum
transmission unit (MTU) of the network.
IP Address. (Internet Protocol address) The address of a computer attached to an IP network. Every client and server
station must have a unique IP address. A 32-bit address used by a computer on a IP network. Client workstations
have either a permanent address or one that is dynamically assigned to them each session. IP addresses are written
as four sets of numbers separated by periods; for example, 204.171.64.2.
Glossary - 5